Method of and means for making adjustable elbows



G. F. HAUF METHOD OF AND MEANS FOR MAKING ADJUSTABLE ELBOWS Aug. 7, 1923. 1,464,318

Filed Dec. 4, 1920 2 Sheets-Sheet 1 Aug 7 1923.

G. F. HAUF METHOD Of AND MEANS FOR MAKING ADJUSTABLE ELBOWS 2 SheetsSheet 2 Filed Dec. 4, 1920 ways p r a lth snonen n. HAUF, or cnioneo, rumors.

Application filed December 4, 1920. Serial No. 428,286.

To all to 7mm it may concern Be it known that l, iginonon F. HAUF, a citizen of the United States, residingat tjhicago, in the county of (look and State ol illinois, have invented certain new and useful improvements in Methods of and ilo-ans for Making Adjustable Elbows, ol which the following is a specification.

This invention relates to adjustable elbows.

'lleretolore, in the manufacture of adjustable elbow sections, it has ordinarily been. the practice to lirst separately cut the required curved edge blanks tor the sections. Then the blanks are rolled to form the cylindrical sections. Next the coacting ends of the cylindrical sections are beaded or edged for interfitting with each other to :form the desired joint between sections. This multiplicity of separate operations requires excessivehandling a number of in depemlent machines and several operators, all of which increases the cost of manufacture.

One of the objects of this invention is to cheapen, simplify and improve the manufacture of elbows.

Another object is to provide an improved method for making elbow sections.

Another object is to provide a machine which will simultaneously perform several operations which have heretofore been successively performed on different machines.

Another object is to provide a machine which will simultaneously cut, form or roll and edge the blanks.

Another object is to provide a method and apparatus whereby all of the sections of an elbow may be blanked from a sheet, edged and rolled at the same time.

Other objects and advantages will hereinafter appear.

An embodiment of the invention is illustrated in the accompanying drawings, wherein Fig. l is a side elevation of a pair oi? cut ting and forming rolls by the use of which sections of elbows may be simultaneously cut, edged and formed from a single sheet. Fig. 2 is an end elevatiom looking toward the left oil Fig. 1.

Fig. 3 is an end view of a fragment of the upper part of the other end 01. the. machine.

Fig. 4 is a plan View of Fig. 3.

.1? provided in Fig. 5 shows a fragment of the rolls with the sheet between them and before the rolls are sufficiently close together to lorm the beads on the adjacent margins of the blanks. i i I Fig. (5 shows the same with the rolls close enough together to cut the sheet and form the beads.

Fig. 7 shows a sectional fragment of the rolls with pins projecting from one roll and registering with clearance depressions in the other roll.

Fig. 8 shows a sheet from which the sections are to be cut, showing in dotted lines the separating cuts and the beads at the separated edges.

Fig. 9 is an. elevation of an adjustable elbow formed of sections produced by the method and machine herein set forth.

in all the views the same reference characters are employed to indicate similar parts. i

The machine upon which the elbow sections are to be formed comprises the rolls A and ll, the housings 10 and 11 ai'lording the bearing for these rolls preferably mounted upon a base plate 12. The roll A is provided with bearings journaled at 13 and 14. Thebearing' l finds support in a square bearing box 15 having laterally disposed trunnions is that move vertically in a slot the housing 10. The trunnion 14: ofthe roll A finds support in a square bearing box 18 that is vertically movable in the slot 19. A cap plate 20 is pivotally mounted, as at 21, upon the upper end of the housing 11 and is providedwith a notch 22 within which is contained a screw 28, rotatable by a handle 24%. The cap plate may be swung into the dotted line'position shown in Fig. l, whereupon the roll A may be moved into the position shown in dotted lines in Fig. 1. The bearings are vertically movable in the openings 19 and 27 of the respective housings. Hand-operated screws 27 pass thru the respective cap plates 20 and the upper portions 28 of the housing 10, and are the means by which the rolls A and B are forced into contact, or substantially into contact, as required.

The rectangular plate 30, of sheet metal from which the blanks subsequently to form the sections of the adjustable elbow. shown in Fig. 9, are to'bo cut, is first provided with aligning notches 31, 32 and 33, at each end,

as clearly shown in Fig. 8, and the corners of the sheet are clipped off, as at 34.. Blank is to be separated upon a curved line 36 from the section 37, and the latter is to be separated from blank 38 by a similar curved line 39, and by a curvedline from blank 41- Blanks 35 and A1 are substantially duplicates and so are blanks 37 and 38 duplicates of each other. The dotted lines show the line of cleavage and the beads that are formed along the edges of the separated blanks. As

is well known in the art, the curves of the edges of the blanks and the number of blanks vary according to the type of elbow to be made.

The cutting and beading instrumentalities are rovided in registerin relation upon the faces of rolls A and i as more clearly appearing in Figs. 1, 5 and 6. They comprise a number of sets of parallel circumferential grooves which form dies in roll A, and cooperating formers and cutters on rollB. The sets of dies are curved relative to. each other to conform to the curved edges or margins of the blanks and the sets of corresponding formers and cutters'are forming die and its former of each set may be made slightly larger than the other, as shown, so that the beads formed thereby in the adjacent margins of the blanks may be I fitted together in forming the elbow joints.

As the sheet is fed between rolls A-and B it is out between the blanks, and the edges of the blanks are edged to facilitate the formation of the joints between sections.

Before the sheet 30 is placed. between the rolls A and B, an aligning series of rivet holes are punched near the edges of the sheet, on each end thereof and properly spaced apart. The holes at each end of the sheet form the openings for receiving the rivets 51 at the joints shown in Fig. 9.

The rolls are each provided with a gear wheel 52 and 53, respectively, which are of the same diameter and have the same number of teeth so that the rolls A and B are coincidentally turned or rotated by the handle 54: or by other means.

Pins 55 are placed in alignment in the roll A to correspond with the vertical row ofrivet holes 50 in Fig. 8 and a series of depressions 56 are made in the roll B to receive the pins 55. The pins may be secured to roll B and the depressions made in roll A if the beads at the joints are to project outwardly instead of extending inwardly.

After a rectangular sheet, such as shown in Fig. 8, has been prepared by having the notches 31 to 33 out in its vertical edges and the holes 50 punched therein, one end of the sheet is placed over the series of pins 55 on the roll A, or B, as the case may be. Now, when the sheet is first entered, the pins are very near the companion roll and are confronting the respective depressions 56 in said roll, so that when the handle 54: is rotated the sheet will be wrappedaround the roll carrying the pins, and the beads 58 and 59 will be formed in the adjoining edges of the separated blanks. In practice the'rolls A and B should be rather larger in diameter than the finished elbow 60, so that the edges, shown in vertical planes in Fig. 8 will not overlap. and so that the edge of sheet 30 that is not secured to the roll may pass from between the rolls before the opposite edge is engaged by the roll in order that the sections 35, 37, 38 and 41 may conveniently be taken from the rolls without disconnecting the upper roll, as shown in Fig. 1, and moving it to dotted line position. This, however may be done in a manner obvious, from the foregoing description, when taken in conjunction with the drawings, when such act is necessary.

hen putting the sections together the smaller beads 595are to be enclosed within" the larger beads 58 and then the edges are riveted by the insertion of the rivets 51 in the overlapping edges through the holes 50.

By cutting out the :piece Or strip 45ifrombetween the beads of the respective blanks to form the elbow sections, a cleaner and better cut is made than when the sheet is sirnply sheared, with loss of very slight amount of material and the cut, by the construction shown, is always made slightly in advance of the bead forming operation, so that the adjoining edges bounding the cut axially move when the slipping of the metal takes place.

In Fig. 9 the beads are shown to extend inwardly of the sections; that is because the pins 55 extend from the roll A, and the blanks are wound about the roll A during the cutting operation. If it is desirable to have the beads 58 extend outwardly, then the pins can be placed on the roll B and the blanks wound about that roll during the cutting operation.

In cutting the blanks from the sheet 30 it is only necessary to move the rollers A and B to the position where the pins 55 on one roller will register with the depressions 56 on the other, and then locate the sheet so that the pins 55 will enter the perforations 50 in one end of the sheet 30, after which the handle 54: should be rotated. This will rotate the rollers A and B coineidently and cause the sheet to follow the roller to which it is attached by the pins 55. While this is being done the sheet is cut, and the cut edges are formed into the beads 58 and 59 on the outside of the cylinder forming the sections ol the elbow or on the inside of the cylinder as desired and determined by the curvature of the patterns. After the sheet 30 has passed between the rolls A and B, a slightly rear movement of the handle 54 will loosen the sheet from the pins and the separated sections can immediately be taken therefrom or, if desired, the roller A, which may be either A or B, may be taken from the frames l0 and 11 or moved into the position shown in dotted lines in Fig. 1, whereupon the sections may then. be moved axially thereof.

While I have herein shown and described a single embodiment of my invention, it will be manifest, to persons skilled in the art, that changes may be made within. the scope of the appended. claims.

llaving described my invention what I claim as new and desire to secure by Letters Patent is l. The method. of making pipe elbow sections which includes simultaneously perlorn'iing the following operations; cutting a sheet of metal into a plurality ol li lanlrs having longitudinally curved outlines; edging adjacent curved margins of the blanks and rolling the blanks into cyliniflrical sections.

2. A machine for simultaneously blanking edging and. rolling elbow sections, comprising a pair of rolls to which a sheet of metal may be fed, said rolls having circumferentially arranged relatively curved sets of cooperating forming and shearing instrumentalities.

A machine for simultaneously blank ing, edging and rolling; elbow sections from sheet metal, comprising a rotatable roll having a plurality of relatively curvedsets of parallel dies including a cutting die, and a cooperating rotatable roll having correspondingly curved sets ol parallel formers and cutters.

A machine for simultaneously blanking, edging and rolling elbow sections from sheet metal, comprising a rotatable roll having a plurality of relatively curved sets of parallel dies including a cutting die, a cooperating rotatable roll havingcorrespondingly curved sets of parallel formers and cutters, and means for positively rotating the rolls to feed a sheet o'l? metal between the same.

5. A. machine for simultaneously blanking, edging and rolling elbow sections from sheet metal, comprising a rotatable roll having a plurality of relatively curved sets of parallel. dies including a. cutting die, a cooperating rotatable roll having correspondingly curved sets of parallel formers and cutters, and means for causing the blanks cut from the sheet to follow one of the rolls.

6. A machine for simultaneously blanking, edging and rolling a set oi? elbow sections, comprising a pair of rolls between which a sheet of metal may be led, said rolls having a plurality of circumferentially arranged relatively curved sets of edging means and shearing means for cutting a strip from the sheet between the edging means of each set.

In testimony whereof I hereunto subscribed. my name.

enonen r. HAUF. 

